Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68c29eaa0c9f72d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 08:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbde6c99bc12c6d41e8dc30e6eebad2e SHA-1: 9ea94e4b4f4bbda0de561aa9a082364e9fb2a0d2 SHA-256: a68c29eaa0c9f72db2b47c81e0a8e4ed922d1ec7b257d37ca0cc001fda1614e5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, 'https://ttraff.com/wix?keyword=pros+and+cons+of+trait+theories+of+p', is associated with known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The document body, though partially corrupted, contains text related to 'Pros and cons of trait theories of p', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=pros+and+cons+of+trait+theories+of+p
    • https://static.usrfiles.com/ugd/7f929b_f31fe6b0d1b64ebfaf98d64bb29e89eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6371cab9a18e4de4afbad73d6b44d57c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4ffcaa7ded843768f2e4d80aa351a0d.pdf
    • https://static.usrfiles.com/ugd/234f58_c727ff37c23143ff8a21c18e47ac4920.pdf
    • https://static.usrfiles.com/ugd/3bf302_a3b9d02a59f1459d8b2e8a3683fcb5e6.pdf
    • https://static.usrfiles.com/ugd/be19e1_174f8ccbf53741029a8723ea2c809ef9.pdf
    • https://static.usrfiles.com/ugd/b8c837_426e891f1dd64b5bae7b05d0f50b8888.pdf
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/byzantine_empire_history.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/crop_rotation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f18.bin
2905737d5d067a499e4e91b603f5cc0403a178cc9cb894d18dc5f737cffabfcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5000 bytes
font_01_sfnt_off00007000.bin
3d89530c405ffe5171a85b3604f15a6ac4a578764bac4952262a6309330be61a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 9932 bytes
font_02_sfnt_off000091e4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E4 4324 bytes